package com.lagou.common;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToByteEncoder;

public class RpcEncoder extends MessageToByteEncoder {

    private Class<?> clazz;

    private Serializer serializer;

    public RpcEncoder(Class<?> clazz, Serializer serializer) {
        this.clazz = clazz;
        this.serializer = serializer;
    }

    @Override

    protected void encode(ChannelHandlerContext channelHandlerContext, Object msg, ByteBuf byteBuf) throws Exception {

        if (clazz != null && clazz.isInstance(msg)) {

            byte[] bytes = serializer.serialize(msg);

//            byteBuf.writeInt(bytes.length);

            byteBuf.writeBytes(bytes);

        }

    }

}